Flexible bag



FIG. 1 is a front perspective view of the flexible bag showing our new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom plan view thereof;

FIG. 4 is a rear elevational view thereof; and,

FIG. 5 is a right side elevational view thereof, the left side being substantially a mirror image. 

The ornamental design for a flexible bag, as shown and described. 